Transfer-printing.



UNITED STATES PATENT- FFICE.

JOGELYN FIELD THORPE, OF MANCHESTER, ENGLAND, ASSIGNOR TO WM. BRIGGS &COMPANY, LIMITED, OF MANCHESTER, ENGLAND.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed December 5, 1905; Serial No. 290,463.

To all w/mm, it may cnnccrni Be it known that I, J OCELYN FIELD TnoRPE,a subject of the King of Great Britain and Ireland, residing at theVictoria University, Manchester, in the county of Lancaster, England,have invented new and useful Improvements Relating to Transfer-Printing,of which the following is a specification.

My invention relates to transfer-printing, and has for its object toobtain an indelible mark on cotton, linen, silk, and other fabrics bymeans of a printed transfer.

In carrying my invention into effect in one convenient manner I form amixture of the indigo salt T, ortho nitro phenyl lactomethyl-ketone withresin and beeswax in the following proportions, by weight: resin,thirty-five parts; indigo salt T, ten parts; beeswax, four parts.sighting material may be added to give the design prominence. This,however, is not necessary, although desirable.

The mixture may be reduced to a suitable or convenient paste either bymeans of heat (in which case the rinting is done hot) or by somesuitable so vent, such as turpentine, an alcohol, or acetone, (in whichcase the printing is done cold.) With this mixture I print the letters,words, or designs onto tissue-paper. The tissue-paper is then placedface downward on the fabric to be marked and is transferred to thefabric to be marked by means of a hot iron according to the usual methodadopted for transfers. The mark or transfer thus produced is thenlightly brushed with a developing solution consisting of an aqueoussolution of caustic soda of about thirty degrees Twaddell or fifteen percent, by weight. The resin, which in the usual course is insoluble inwater, is by the action of the alkali converted into resin soap, whichis soluble in cold water. At the same time the alkali converts theindigo salt T into indigo, and hence causes it to be fixed indelibly onand in the fibers of the fabric.

A little coloring or- Transfers produced by the method-described can beused as described on fabrics composed of cotton, linen, jute, and othervegetable or non-nitrogenous fibers and also on fabrics composed of silkfibers.

Itis intended that as a rule the printing onto the tissue-paper be doneon a large scale in a factory or factories and that the papers with thedesigns be then sold and the transferring of the designs, letters, orwords and the development of them by the alkali be done by thepurchasers.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The process of transfer-printing consisting in applying the requireddesign to a supporting medium by a mixture of indigo salt T and acarrying medium which is transferred to the fabric by the action ofheat,and subsequently by the addition of an alkaline solution converting thecarrying medium into soap to permit of its ready removal and convertingthe indigo salt T into indigo and leaving it indelibly printed on and inthe fibers of the fabric, substantially as described.

2. The herein-described process of transferprinting, consisting inprinting onto a suitable supporting medium b means of a mixture ofindigo salt T wit resin, and then transferring the design to the fabricto be marked and by means of an alkaline solution converting the resininto soap and converting the indigo salt T into indigo, thus leaving thedesign indelibly printed in indigo on and in the fibers of the fabric,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOCELYN FIELD THORPE.

Witnesses:

ROBERT MORRISON NEILSON, VIVIAN ARTHUR HUGHES.

